Upgrade V8 to version 4.9.385.28

https://chromium.googlesource.com/v8/v8/+/4.9.385.28

Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/parallel-optimize-disabled.js b/test/mjsunit/parallel-optimize-disabled.js
index c144e64..1dbce06 100644
--- a/test/mjsunit/parallel-optimize-disabled.js
+++ b/test/mjsunit/parallel-optimize-disabled.js
@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --nodead-code-elimination --concurrent-recompilation
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --legacy-const
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");